A block of mass 27.00 kg sits on a horizontal surface with, coefficient of kinetic friction 0.50 and a coefficient of static friction 0.65. How much force is required to
get the block moving?

The force is  

Explanation:

From the question we are told that

    The  mass of the block is  

     The  coefficient of  static friction is  

     The coefficient of kinetic friction is  

The  normal force acting on the block is  

substituting values

Given that the force we are to find is the force required to get the block to start moving then the force acting against this force is the static frictional force which is mathematically evaluated as

substituting values

Now for this  block to move the force require is  equal to i.e

=>    

part 1: which substance has a higher solubility?

a

smallest amount left undissolved atall temps in table shown most has dissolved high sol'by